Saorise Ronan is a killing machine, or at least she is in the trailer for Hanna, which reunites her with the director of Atonement, Joe Wright. She plays a 14-year-old girl raised in the wilds of Finland by her ex-CIA dad (Eric Bana) to be a cold-blooded killing machine. After being sent out on a mission, she must elude agents who are sent stop her by a ruthless intelligence operative with secrets of her own (Cate Blanchett). As she nears her ultimate target, Hanna faces startling revelations about her existence and unexpected questions about her humanity. The trailer suggest that despite the slightly Bourne-esque plot, this could be something far darker and more interesting, especially with a teen girl killer at its core. Click below for the trailer. The movie will be in cinemas next April.